Re: Help in removing Oprofile

Hi Will,

Thank you and Sorry for delayed response. I have enabled
CONFIG_HAVE_PERF_EVENTS=y. I Forgot to mention, Oprofile I am trying to
bring up on KVM virtual machine.  If I build on physical server,
oprofile-1.0.0 is working fine.  And I can connect to running process for
profiling. But If I build oprofle-1.0.0 on KVM VM, I see

"Your kernel's Performance Events Subsystem does not support your processor
type.
Please use the opcontrol command instead of operf."

Then I tried with Oprofile-0.9.9, I see opcontrol command works, I want to
connect to running process for profilng.

Let me know if I am doing anything wrong. I saw opcontrol options, but I
couldn't see to connect to running process.

Thanks,
Shiva




On Thu, Feb 2, 2017 at 1:59 AM, William Cohen <[email protected]> wrote:

> On 02/01/2017 12:43 PM, Shiva M wrote:
> > Hi Will,
> >
> > I am using Oprofile 0.9.9.  I tried with Oprofile-1.0.0 but later I
> found kernel CPU counters were not supported. Shall I try with
> Oprofile-0.9.7?. I did following to build Oprofile
> >
> > Oprofile-0.9.9>./configure --enable-static  --with-kernel-support
> --prefix=/home/shiva/usr
> >     sudo make
> >     make install
> >     DESTDIR="/home/shiva/user"
> >
> >
> > Thanks,
> > Shiva
>
> Hi Shiva,
>
> opcontrol was removed from oprofile-1.0.0, so the kernel will need to be
> built with CONFIG_PERF_EVENTS=y in the .config file to use oprofile-1.0.0.
> You might check to see if the kernel perf infrastructure works with command
> "perf stat true".  I have used that in the past to determine whether the
> problem is in oprofile or in the kernel.  If it works oprofile is the
> problem, if that perf command is broken then need to look at the kernel.
> Is the kernel built with the oprofile driver (CONFIG_OPROFILE=m?  If not
> opcontrol won't work.  Another thing to keep in mind is that some newer
> processors might not be recognized by the oprofile driver.  I would
> encourage you to use the oprofile perf interface with operf rather than the
> opcontrol interface.
>
> When things fail it would be helpful to include the specific error
> messages in the dicussion to better diagnose the reason for the failure.
>
> -Will
>

------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, SlashDot.org! http://sdm.link/slashdot

_______________________________________________
oprofile-list mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/oprofile-list